Double-acting force-pump



No. 627,235. Patented lune 2U, |899. C. E. NEWMAN.

DOUBLE ACTING FORCE PUMP.

(Application led Mar. 24, 1899.) (No Model.) 2 Sheets-Sheet I.

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c. E. NEWMAN. DOUBLE ACTING FORCE PUMP.

(Applction led Mar. 24, 1899.)

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UNITED STATES PATENT OFFICE.

CHARLES E. NEWMAN, OF ALBION, NEV YORK.

DOUBLE-ACTING FORCE-PUMP.

SPECIFICATION forming peut of Letters recent No. 627,235, dated June 20,1899.

Application filed March 24, 1899.

To @ZZ whom it may concern:

Be it known that I, CHARLES E. NEWMAN. a citizen of the United States,residing at Albien, in the county of Orleans and State of NewYork, haveinvented certain new and useful Improvements in Double-Acting Force-Pumps, of which the following is a specification.

The invention herein is an improvement in the pump for which LettersPatent were granted to nie October 5, 1880. In this patent an outer andinner cup part form the piston, in which the outer cup part has itsentire circumferential wall in water tight joining with thecylinder-wall and the Vinner cup part is inverted ou the end of a hollowpiston-rod and forms an annular space between the cup parts throughwhich the water from the upper cylinder-chamber part passes into theunder open inner cup part and is discharged through its connected hollowpistonrod. In this construction two causes tended to render the pistonhard in its movements, because, primarily,the area of its outer packedwalls is too extensive andthe friction too much and because the downowof the water between thecups to the inner cup is not suficiently free inthe upstroke of the piston, and from these two causes the working of thepump required too much strength, and par ticularly inv the liftingdisplacing action of the piston. My present improvement is to render iteasier to operate the cup-piston in connection with its discharge-pipe,which forms also the piston-rod, and the construction which embodies theprecise improvement is illustrated in the accompanying drawings and setout in the concluding claim.

, Referring to the drawings, Figure l shows in elevation a submergedpump to which my improvement is applied. Fig. 2 is a vertical section ofthe same, the piston being shown on its upstroke. Fig. 3 is a likesection taken at right angles to the section-line of Fig. 2. Fig. 4 is aside view of the piston cup parts. Fig. 5 is a horizontal section of thesaine, taken on the line a b of Fig. 3. Fig. 6 is a View of the side ofthe piston cup parts at right angles to the side seenln Fig.' 4, andFig. 7 is a top view of the valved cup piston part.

The cylinder is used submerged in the well and has induction-portsprovided with valves Serial No. 710,296. (No model l l l, openinginwardly at its lower and at its upper ends, the upper valves being onopposite sides of the cylinder. About mediately of its length and onopposite sides the cylinder is preferably formed with hollow bosses 2 2,by which it is mounted on trunnions 3 3 4in a metal frame 4, which isfirmly supported in the well, the trunnions being preferably screw-boltstapped into arms of the supporlingframe-` i The piston-rod is hollow,serves as the discharge-pipe working through a stufing-box at the top ofthe cylinder, and carries at its lower end a double-acting piston of twoconnected cup parts, one Within the other, the

inner part inverted on the end of the hollow piston-rod, the outer partworkin g with packed Walls within the cylinder, with a stroke suited tothe size of the cylinder. "Theworking piston part 6 is open at its upperend and is provided With au upward-opening valve 7 at its lower end. Atits lower end its circumference is unbroken to form the packingring orhead 8, while its cup part proper, which eX- tends from said base ringor head toits open top, is open at its opposite sides to form spaces 1010,Fig. 2,between this cup part and the walls 0l the cylinder for apurpose which gives importance to my improvement. Thelower open end ofthe piston-rod cup part extends to and Works on the seat9,whichsurrounds the valve 7 of the working cup part,so that in thedescent of the piston-rod its cup part will be seated,and the valve 7being thereby caused to open will put the hollowpiston-rod in directcommunication with the lower chamber part 11 of the cylinder and withthe well, and thereby force and discharge the water into and from thehollow piston-rod. For this purpose the piston cup part has trunnions12, on which the working cup part is hung by openings 13 in itswalls,which openings being vertically oblong allow the cup parts to haveamovement upon each other on the descent of the piston sufficient toseat and to close or to unseat and to open the two parts at the valve toopen their interior communication with the lower chamber part of thecylinder for the discharge of the water, as stated, or 1:0 open thepiston parts for the discharge of the water from the upper'cylinder-chamber. On the ascent of the piston-rod the cup parts willseparate with IOO a movement sufficient to open them at their seat,forming surface 9, as seen in Figs. 2 and 3, and the valve 7 of theworking cup part being thereby closed the water from the upper chamber`part 14 of the cylinder will be forced down into and through the spaces10 10 into and discharge from the hollow pistonrod. In this movement ofthe piston it will be noted that the water from the cylinder passes intothe piston cup part between its walls and the walls of the cylinder, andthis results from the construction of the working cup part, whichprovides the side spaces 10 by its open walls. The importance of thisconstruction of open walls in the working cup is that it reduces thefrictional contact of such Working cup part to a minimum, and it is thisconstruction whichis the improvement that makes the working of thepiston easy, and especially in its ascent, for referring to Figs. 6 and7 it will be seen that the walls of the Working part of the piston formonly arms 15 15, by which the two cup parts are coupled, and these armsform only about onethird the circumference of the working cup, leavingthe other two-thirds part as open spaces for the water-flow and leavingonly a base-ring part as the friction-surface.

By reason of the length of the couplingarms of the working piston partits ring base is prevented from having any undue binding on thecylinder-walls, and to render these coupling-arms practically Withoutfriction on the cylinder-walls they are provided with horizontalwater-packed grooves or channels 16, which opening at their ends intothe water-spaces l0 10, as in Figs. 6 and 7, keep them free of sand ordirt.

Referring to Fig. 2, it will be understood that the piston being on itsascending movevment the water will be displaced from the uppercylinder-chamber part into the inner piston cup part, the uppercylinder-valves will be closed and the lower cylinder-chamber part Willfill with water, as indicated by the arrows, while on the descendingmovement of the piston the water will be displaced from the lowercylinder-chamber part into the inner piston cup part, the uppercylinder-valves will be opened, and the upper chamber part will therebyill with wafer.

The mounting of the cylinder upon. trunnions, as in Fig. 2, gives it' aself-adjusting function under the action of the piston-rod,l while theprovision of the lever 17 and its link 18, pivotally connecting thelever to the discharge-pipe in a vertical line with said pipe, conducesvery much to give ease and quick movements to the piston and to coperatewith the trunnioned cylinder in controlling the rocking movements of thecylinder to prevent any binding of the piston and its rod with thecylinder.

Ihave shown the outerbase ring or head 8 as having a packing-ring 19;but the groove or channel itself will form a sufficient waterpacking, sothat no-rubber or leather is necessary, and water does not stand in thedischarge-pipe.

While the handle connection shown gives easy work, yet it is obviousthat any suitable handle connection may be used.

I claim as my improvement- In a submerged double-acting force-pumpwherein a hollow discharging piston-rod is combined withpivotally-coupled telescoping piston cup parts and the valved cylinder,the outer cup part forming the valved pistouhead and having itscup-forming walls circumferentially interrupted or open the full lengthof the telescoping cups forming opposite side-Wall water-spaces 10, 10uncovering two sides of the inner piston cup part and opening directlyinto its lower end, the pivotbearing wall parts of said outer cupforming circumferential guide-surfaces in. contact with thecylinder-walls and with the walls of the inner cup, whereby the lift ofthe piston is rendered easy and the water caused to ow full and freeinto the inner cup between its outer walls and the inner walls of thecylinder.

In testimony whereof I affix my signature in presence of two witnesses.

cHAs. E. NEWMAN.

Witnesses:

AUGUSTUS W. BEHREND, J. W. WRIGHT.

